German lithium-ion based energy storage system maker Sonnen says it achieved an undisclosed “seven-figure sales number” in the US in the first quarter of this year.

Silicon Valley’s Green Charge Networks, which mainly delivers energy storage systems for commercial customers and is involved in a deal to re-purpose ‘second life’ EV batteries, has been acquired by Engie.

Germany, until recently the leading European nation for installed PV capacity, extended a scheme to support purchases of lithium-ion energy storage systems for solar at the beginning of this year.

It would be unfair to put the burden of paying for the rollout of smart meters onto German households with PV-plus-storage when the devices would primarily benefit grid operators, trade association BSW Solar has said.

Microinverter maker and energy management specialist Enphase has started taking orders from installers for its AC battery for home PV systems in Australia and New Zealand, with shipments to start arriving in August 2016.

Oil and gas company Total has proposed to buy battery company Saft, which produces devices for the stationary storage industry as well as for transport and other applications.

Global maker of construction and mining equipment Caterpillar has launched an integrated micro-grid solution which combines solar PV and energy storage with the company’s power generation equipment.

Tucson Electric Power (TEP), a utility in Southern Arizona with around 420,000 customers, has received approval to build two 10MW energy storage systems, including one co-located with solar, from the state’s regulator.

An influential German think tank and a national energy storage industry association have both said that long-term solutions need to be found for residential solar-plus-storage owners’ part-time reliance on the grid.

Operators of transmission infrastructure and wholesale markets in the US have supplied their views on energy storage to the Federal Energy Regulatory Commission (FERC), with industry and other stakeholders expected to follow. Energy-Storage.News’ Andy Colthorpe spoke with Energy Storage Association policy expert Jason Burwen on what he describes as a “systematic review” that could have a transformative effect on the market and drivers for storage.